src/gtk/glcanvas.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        gtk/glcanvas.cpp
   3 // Purpose:     wxGLCanvas, for using OpenGL/Mesa with wxWidgets and GTK
   4 // Author:      Robert Roebling
   5 // Modified by:
   6 // Created:     17/08/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Robert Roebling
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #include "wx/setup.h"
  16
  17 #if wxUSE_GLCANVAS
  18
  19 #include "wx/glcanvas.h"
  20
  21 #include "wx/frame.h"
  22 #include "wx/colour.h"
  23 #include "wx/module.h"
  24 #include "wx/app.h"
  25
  26 extern "C"
  27 {
  28 #include "gtk/gtk.h"
  29 #include "gdk/gdk.h"
  30 #include "gdk/gdkx.h"
  31 }
  32
  33 #include "wx/gtk/win_gtk.h"
  34
  35 // DLL options compatibility check:
  36 #include "wx/build.h"
  37 WX_CHECK_BUILD_OPTIONS("wxGL")
  38
  39
  40 //---------------------------------------------------------------------------
  41 // static variables
  42 //---------------------------------------------------------------------------
  43 int wxGLCanvas::m_glxVersion = 0;
  44
  45 //---------------------------------------------------------------------------
  46 // global data
  47 //---------------------------------------------------------------------------
  48
  49 XVisualInfo *g_vi = (XVisualInfo*) NULL;
  50 //-----------------------------------------------------------------------------
  51 // idle system
  52 //-----------------------------------------------------------------------------
  53
  54 extern void wxapp_install_idle_handler();
  55 extern bool g_isIdle;
  56
  57 //---------------------------------------------------------------------------
  58 // wxGLContext
  59 //---------------------------------------------------------------------------
  60
  61 IMPLEMENT_CLASS(wxGLContext,wxObject)
  62
  63 wxGLContext::wxGLContext( bool WXUNUSED(isRGB), wxWindow *win, const wxPalette& WXUNUSED(palette) )
  64 {
  65     m_window = win;
  66     m_widget = win->m_wxwindow;
  67
  68     wxGLCanvas *gc = (wxGLCanvas*) win;
  69
  70     if (wxGLCanvas::GetGLXVersion() >= 13)
  71     {
  72         // GLX >= 1.3
  73         GLXFBConfig *fbc = gc->m_fbc;
  74         wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
  75         m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE, None, GL_TRUE );
  76     }
  77     else
  78     {
  79         // GLX <= 1.2
  80         XVisualInfo *vi = (XVisualInfo *) gc->m_vi;
  81         wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
  82         m_glContext = glXCreateContext( GDK_DISPLAY(), vi, None, GL_TRUE );
  83     }
  84
  85     wxCHECK_RET( m_glContext, _T("Couldn't create OpenGl context") );
  86 }
  87
  88 wxGLContext::wxGLContext(
  89                bool WXUNUSED(isRGB), wxWindow *win,
  90                const wxPalette& WXUNUSED(palette),
  91                const wxGLContext *other        /* for sharing display lists */
  92 )
  93 {
  94     m_window = win;
  95     m_widget = win->m_wxwindow;
  96
  97     wxGLCanvas *gc = (wxGLCanvas*) win;
  98
  99     if (wxGLCanvas::GetGLXVersion() >= 13)
 100     {
 101         // GLX >= 1.3
 102         GLXFBConfig *fbc = gc->m_fbc;
 103         wxCHECK_RET( fbc, _T("invalid GLXFBConfig for OpenGl") );
 104         m_glContext = glXCreateNewContext( GDK_DISPLAY(), fbc[0], GLX_RGBA_TYPE,
 105                                            other ? other->m_glContext : None,
 106                                            GL_TRUE );
 107     }
 108     else
 109     {
 110         // GLX <= 1.2
 111         XVisualInfo *vi = (XVisualInfo *) gc->m_vi;
 112         wxCHECK_RET( vi, _T("invalid visual for OpenGl") );
 113         m_glContext = glXCreateContext( GDK_DISPLAY(), vi,
 114                                         other ? other->m_glContext : None,
 115                                         GL_TRUE );
 116     }
 117
 118     if ( !m_glContext )
 119     {
 120         wxFAIL_MSG( _T("Couldn't create OpenGl context") );
 121     }
 122 }
 123
 124 wxGLContext::~wxGLContext()
 125 {
 126     if (!m_glContext) return;
 127
 128     if (m_glContext == glXGetCurrentContext())
 129     {
 130         if (wxGLCanvas::GetGLXVersion() >= 13)
 131             // GLX >= 1.3
 132             glXMakeContextCurrent( GDK_DISPLAY(), None, None, NULL);
 133         else
 134             // GLX <= 1.2
 135             glXMakeCurrent( GDK_DISPLAY(), None, NULL);
 136     }
 137
 138     glXDestroyContext( GDK_DISPLAY(), m_glContext );
 139 }
 140
 141 void wxGLContext::SwapBuffers()
 142 {
 143     if (m_glContext)
 144     {
 145         GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
 146         glXSwapBuffers( GDK_DISPLAY(), GDK_WINDOW_XWINDOW( window ) );
 147     }
 148 }
 149
 150 void wxGLContext::SetCurrent()
 151 {
 152     if (m_glContext)
 153     {
 154         GdkWindow *window = GTK_PIZZA(m_widget)->bin_window;
 155
 156         if (wxGLCanvas::GetGLXVersion() >= 13)
 157             // GLX >= 1.3
 158             glXMakeContextCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window),
 159                                    GDK_WINDOW_XWINDOW(window), m_glContext );
 160         else
 161             // GLX <= 1.2
 162             glXMakeCurrent( GDK_DISPLAY(), GDK_WINDOW_XWINDOW(window), m_glContext );
 163     }
 164 }
 165
 166 void wxGLContext::SetColour(const wxChar *colour)
 167 {
 168     wxColour col = wxTheColourDatabase->Find(colour);
 169     if (col.Ok())
 170     {
 171         float r = (float)(col.Red()/256.0);
 172         float g = (float)(col.Green()/256.0);
 173         float b = (float)(col.Blue()/256.0);
 174         glColor3f( r, g, b);
 175     }
 176 }
 177
 178 void wxGLContext::SetupPixelFormat()
 179 {
 180 }
 181
 182 void wxGLContext::SetupPalette( const wxPalette& WXUNUSED(palette) )
 183 {
 184 }
 185
 186 wxPalette wxGLContext::CreateDefaultPalette()
 187 {
 188     return wxNullPalette;
 189 }
 190
 191 //-----------------------------------------------------------------------------
 192 // "realize" from m_wxwindow
 193 //-----------------------------------------------------------------------------
 194
 195 extern "C" {
 196 static gint
 197 gtk_glwindow_realized_callback( GtkWidget *WXUNUSED(widget), wxGLCanvas *win )
 198 {
 199     if ( !win->m_glContext )
 200     {
 201         wxGLContext *share = win->m_sharedContext;
 202         if ( !share && win->m_sharedContextOf )
 203             share = win->m_sharedContextOf->GetContext();
 204
 205         win->m_glContext = new wxGLContext( TRUE, win, wxNullPalette, share );
 206     }
 207
 208     return FALSE;
 209 }
 210 }
 211
 212 //-----------------------------------------------------------------------------
 213 // "map" from m_wxwindow
 214 //-----------------------------------------------------------------------------
 215
 216 extern "C" {
 217 static gint
 218 gtk_glwindow_map_callback( GtkWidget * WXUNUSED(widget), wxGLCanvas *win )
 219 {
 220     if (win->m_glContext/* && win->m_exposed*/)
 221     {
 222         wxPaintEvent event( win->GetId() );
 223         event.SetEventObject( win );
 224         win->GetEventHandler()->ProcessEvent( event );
 225
 226         win->m_exposed = FALSE;
 227         win->GetUpdateRegion().Clear();
 228     }
 229
 230     return FALSE;
 231 }
 232 }
 233
 234 //-----------------------------------------------------------------------------
 235 // "expose_event" of m_wxwindow
 236 //-----------------------------------------------------------------------------
 237
 238 extern "C" {
 239 static void
 240 gtk_glwindow_expose_callback( GtkWidget *WXUNUSED(widget), GdkEventExpose *gdk_event, wxGLCanvas *win )
 241 {
 242     if (g_isIdle)
 243         wxapp_install_idle_handler();
 244
 245     win->m_exposed = TRUE;
 246
 247     win->GetUpdateRegion().Union( gdk_event->area.x,
 248                                   gdk_event->area.y,
 249                                   gdk_event->area.width,
 250                                   gdk_event->area.height );
 251 }
 252 }
 253
 254 //-----------------------------------------------------------------------------
 255 // "size_allocate" of m_wxwindow
 256 //-----------------------------------------------------------------------------
 257
 258 extern "C" {
 259 static void
 260 gtk_glcanvas_size_callback( GtkWidget *WXUNUSED(widget), GtkAllocation* alloc, wxGLCanvas *win )
 261 {
 262     if (g_isIdle)
 263         wxapp_install_idle_handler();
 264
 265     if (!win->m_hasVMT)
 266         return;
 267
 268     wxSizeEvent event( wxSize(win->m_width,win->m_height), win->GetId() );
 269     event.SetEventObject( win );
 270     win->GetEventHandler()->ProcessEvent( event );
 271 }
 272 }
 273
 274 //---------------------------------------------------------------------------
 275 // wxGlCanvas
 276 //---------------------------------------------------------------------------
 277
 278 IMPLEMENT_CLASS(wxGLCanvas, wxWindow)
 279
 280 BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow)
 281     EVT_SIZE(wxGLCanvas::OnSize)
 282 END_EVENT_TABLE()
 283
 284 wxGLCanvas::wxGLCanvas( wxWindow *parent, wxWindowID id,
 285                         const wxPoint& pos, const wxSize& size,
 286                         long style, const wxString& name,
 287                         int *attribList,
 288                         const wxPalette& palette )
 289 {
 290     Create( parent, NULL, NULL, id, pos, size, style, name, attribList, palette );
 291 }
 292
 293 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 294                         const wxGLContext *shared,
 295                         wxWindowID id,
 296                         const wxPoint& pos, const wxSize& size,
 297                         long style, const wxString& name,
 298                         int *attribList,
 299                         const wxPalette& palette )
 300 {
 301     Create( parent, shared, NULL, id, pos, size, style, name, attribList, palette );
 302 }
 303
 304 wxGLCanvas::wxGLCanvas( wxWindow *parent,
 305                         const wxGLCanvas *shared,
 306                         wxWindowID id,
 307                         const wxPoint& pos, const wxSize& size,
 308                         long style, const wxString& name,
 309                         int *attribList,
 310                         const wxPalette& palette )
 311 {
 312     Create( parent, NULL, shared, id, pos, size, style, name, attribList, palette );
 313 }
 314
 315 bool wxGLCanvas::Create( wxWindow *parent,
 316                          const wxGLContext *shared,
 317                          const wxGLCanvas *shared_context_of,
 318                          wxWindowID id,
 319                          const wxPoint& pos, const wxSize& size,
 320                          long style, const wxString& name,
 321                          int *attribList,
 322                          const wxPalette& palette)
 323 {
 324     m_sharedContext = (wxGLContext*)shared;  // const_cast
 325     m_sharedContextOf = (wxGLCanvas*)shared_context_of;  // const_cast
 326     m_glContext = (wxGLContext*) NULL;
 327
 328     m_exposed = FALSE;
 329     m_noExpose = TRUE;
 330     m_nativeSizeEvent = TRUE;
 331     m_fbc = NULL;
 332     m_vi = NULL;
 333
 334     // to be sure the glx version is known
 335     wxGLCanvas::QueryGLXVersion();
 336
 337     if (wxGLCanvas::GetGLXVersion() >= 13)
 338     {
 339         // GLX >= 1.3 uses a GLXFBConfig
 340         GLXFBConfig * fbc = NULL;
 341         if (wxTheApp->m_glFBCInfo != NULL)
 342         {
 343             fbc = (GLXFBConfig *) wxTheApp->m_glFBCInfo;
 344             m_canFreeFBC = FALSE; // owned by wxTheApp - don't free upon destruction
 345         }
 346         else
 347         {
 348             fbc = (GLXFBConfig *) wxGLCanvas::ChooseGLFBC(attribList);
 349             m_canFreeFBC = TRUE;
 350         }
 351         m_fbc = fbc;  // save for later use
 352         wxCHECK_MSG( m_fbc, FALSE, _T("required FBConfig couldn't be found") );
 353     }
 354
 355     XVisualInfo *vi = NULL;
 356     if (wxTheApp->m_glVisualInfo != NULL)
 357     {
 358         vi = (XVisualInfo *)wxTheApp->m_glVisualInfo;
 359         m_canFreeVi = FALSE; // owned by wxTheApp - don't free upon destruction
 360     }
 361     else
 362     {
 363         if (wxGLCanvas::GetGLXVersion() >= 13)
 364         // GLX >= 1.3
 365             vi = glXGetVisualFromFBConfig(GDK_DISPLAY(), m_fbc[0]);
 366         else
 367             // GLX <= 1.2
 368             vi = (XVisualInfo *) ChooseGLVisual(attribList);
 369
 370         m_canFreeVi = TRUE;
 371     }
 372
 373     m_vi = vi;  // save for later use
 374
 375     wxCHECK_MSG( m_vi, FALSE, _T("required visual couldn't be found") );
 376     GdkVisual *visual;
 377     GdkColormap *colormap;
 378
 379     // MR: This needs a fix for lower gtk+ versions too. Might need to rethink logic (FIXME)
 380 #if defined(__WXGTK20__) && GTK_CHECK_VERSION(2,2,0)
 381     if (!gtk_check_version(2,2,0))
 382     {
 383         wxWindow::Create( parent, id, pos, size, style, name );
 384
 385         m_glWidget = m_wxwindow;
 386
 387         GdkScreen *screen = gtk_widget_get_screen( m_glWidget );
 388         colormap = gdk_screen_get_default_colormap(screen);
 389         visual = gdk_colormap_get_visual(colormap);
 390
 391         if (GDK_VISUAL_XVISUAL(visual)->visualid != vi->visualid)
 392         {
 393             visual = gdk_x11_screen_lookup_visual( screen, vi->visualid );
 394             colormap = gdk_colormap_new(visual, FALSE);
 395         }
 396
 397         gtk_widget_set_colormap( m_glWidget, colormap );
 398     }
 399     else
 400 #endif
 401     {
 402         visual = gdkx_visual_get( vi->visualid );
 403         colormap = gdk_colormap_new( visual, TRUE );
 404
 405         gtk_widget_push_colormap( colormap );
 406         gtk_widget_push_visual( visual );
 407
 408         wxWindow::Create( parent, id, pos, size, style, name );
 409         m_glWidget = m_wxwindow;
 410     }
 411
 412     gtk_widget_set_double_buffered( m_glWidget, FALSE );
 413
 414     gtk_pizza_set_clear( GTK_PIZZA(m_wxwindow), FALSE );
 415
 416     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "realize",
 417                             GTK_SIGNAL_FUNC(gtk_glwindow_realized_callback), (gpointer) this );
 418
 419     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "map",
 420                             GTK_SIGNAL_FUNC(gtk_glwindow_map_callback), (gpointer) this );
 421
 422     gtk_signal_connect( GTK_OBJECT(m_wxwindow), "expose_event",
 423         GTK_SIGNAL_FUNC(gtk_glwindow_expose_callback), (gpointer)this );
 424
 425     gtk_signal_connect( GTK_OBJECT(m_widget), "size_allocate",
 426         GTK_SIGNAL_FUNC(gtk_glcanvas_size_callback), (gpointer)this );
 427
 428     if (gtk_check_version(2,2,0) != NULL)
 429     {
 430         gtk_widget_pop_visual();
 431         gtk_widget_pop_colormap();
 432     }
 433
 434     // if our parent window is already visible, we had been realized before we
 435     // connected to the "realize" signal and hence our m_glContext hasn't been
 436     // initialized yet and we have to do it now
 437     if (GTK_WIDGET_REALIZED(m_wxwindow))
 438         gtk_glwindow_realized_callback( m_wxwindow, this );
 439
 440     if (GTK_WIDGET_MAPPED(m_wxwindow))
 441         gtk_glwindow_map_callback( m_wxwindow, this );
 442
 443     return TRUE;
 444 }
 445
 446 wxGLCanvas::~wxGLCanvas()
 447 {
 448     GLXFBConfig * fbc = (GLXFBConfig *) m_fbc;
 449     if (fbc && m_canFreeFBC)
 450         XFree( fbc );
 451
 452     XVisualInfo *vi = (XVisualInfo *) m_vi;
 453     if (vi && m_canFreeVi)
 454         XFree( vi );
 455
 456     delete m_glContext;
 457 }
 458
 459 void* wxGLCanvas::ChooseGLVisual(int *attribList)
 460 {
 461     int data[512];
 462     GetGLAttribListFromWX( attribList, data );
 463     attribList = (int*) data;
 464
 465     Display *dpy = GDK_DISPLAY();
 466
 467     return glXChooseVisual( dpy, DefaultScreen(dpy), attribList );
 468 }
 469
 470 void* wxGLCanvas::ChooseGLFBC(int *attribList)
 471 {
 472     int data[512];
 473     GetGLAttribListFromWX( attribList, data );
 474     attribList = (int*) data;
 475
 476     int returned;
 477     return glXChooseFBConfig( GDK_DISPLAY(), DefaultScreen(GDK_DISPLAY()),
 478                               attribList, &returned );
 479 }
 480
 481
 482 void wxGLCanvas::GetGLAttribListFromWX(int *wx_attribList, int *gl_attribList )
 483 {
 484     if (!wx_attribList)
 485     {
 486         if (wxGLCanvas::GetGLXVersion() >= 13)
 487         // leave GLX >= 1.3 choose the default attributes
 488             gl_attribList[0] = 0;
 489         else
 490         {
 491             int i = 0;
 492             // default settings if attriblist = 0
 493             gl_attribList[i++] = GLX_RGBA;
 494             gl_attribList[i++] = GLX_DOUBLEBUFFER;
 495             gl_attribList[i++] = GLX_DEPTH_SIZE;   gl_attribList[i++] = 1;
 496             gl_attribList[i++] = GLX_RED_SIZE;     gl_attribList[i++] = 1;
 497             gl_attribList[i++] = GLX_GREEN_SIZE;   gl_attribList[i++] = 1;
 498             gl_attribList[i++] = GLX_BLUE_SIZE;    gl_attribList[i++] = 1;
 499             gl_attribList[i++] = GLX_ALPHA_SIZE;   gl_attribList[i++] = 0;
 500             gl_attribList[i++] = None;
 501         }
 502     }
 503     else
 504     {
 505         int arg=0, p=0;
 506         while( (wx_attribList[arg]!=0) && (p<510) )
 507         {
 508             switch( wx_attribList[arg++] )
 509             {
 510                 case WX_GL_RGBA:
 511                     if (wxGLCanvas::GetGLXVersion() <= 12)
 512                         // for GLX >= 1.3, GLX_RGBA is useless (setting this flags will crash on most opengl implm)
 513                         gl_attribList[p++] = GLX_RGBA;
 514                     break;
 515                 case WX_GL_BUFFER_SIZE:
 516                     gl_attribList[p++] = GLX_BUFFER_SIZE;
 517                     gl_attribList[p++] = wx_attribList[arg++];
 518                     break;
 519                 case WX_GL_LEVEL:
 520                     gl_attribList[p++] = GLX_LEVEL;
 521                     gl_attribList[p++] = wx_attribList[arg++];
 522                     break;
 523                 case WX_GL_DOUBLEBUFFER:
 524                     if (wxGLCanvas::GetGLXVersion() <= 12)
 525                         gl_attribList[p++] = GLX_DOUBLEBUFFER;
 526                     else
 527                         // for GLX >= 1.3, GLX_DOUBLEBUFFER format is different (1 <=> True)
 528                         // it seems this flag is useless for some hardware opengl implementation.
 529                         // but for Mesa 6.2.1, this flag is used so don't ignore it.
 530                         gl_attribList[p++] = GLX_DOUBLEBUFFER;
 531                     gl_attribList[p++] = 1;
 532                     break;
 533                 case WX_GL_STEREO:
 534                     gl_attribList[p++] = GLX_STEREO;
 535                     break;
 536                 case WX_GL_AUX_BUFFERS:
 537                     gl_attribList[p++] = GLX_AUX_BUFFERS;
 538                     gl_attribList[p++] = wx_attribList[arg++];
 539                     break;
 540                 case WX_GL_MIN_RED:
 541                     gl_attribList[p++] = GLX_RED_SIZE;
 542                     gl_attribList[p++] = wx_attribList[arg++];
 543                     break;
 544                 case WX_GL_MIN_GREEN:
 545                     gl_attribList[p++] = GLX_GREEN_SIZE;
 546                     gl_attribList[p++] = wx_attribList[arg++];
 547                     break;
 548                 case WX_GL_MIN_BLUE:
 549                     gl_attribList[p++] = GLX_BLUE_SIZE;
 550                     gl_attribList[p++] = wx_attribList[arg++];
 551                     break;
 552                 case WX_GL_MIN_ALPHA:
 553                     gl_attribList[p++] = GLX_ALPHA_SIZE;
 554                     gl_attribList[p++] = wx_attribList[arg++];
 555                     break;
 556                 case WX_GL_DEPTH_SIZE:
 557                     gl_attribList[p++] = GLX_DEPTH_SIZE;
 558                     gl_attribList[p++] = wx_attribList[arg++];
 559                     break;
 560                 case WX_GL_STENCIL_SIZE:
 561                     gl_attribList[p++] = GLX_STENCIL_SIZE;
 562                     gl_attribList[p++] = wx_attribList[arg++];
 563                     break;
 564                 case WX_GL_MIN_ACCUM_RED:
 565                     gl_attribList[p++] = GLX_ACCUM_RED_SIZE;
 566                     gl_attribList[p++] = wx_attribList[arg++];
 567                     break;
 568                 case WX_GL_MIN_ACCUM_GREEN:
 569                     gl_attribList[p++] = GLX_ACCUM_GREEN_SIZE;
 570                     gl_attribList[p++] = wx_attribList[arg++];
 571                     break;
 572                 case WX_GL_MIN_ACCUM_BLUE:
 573                     gl_attribList[p++] = GLX_ACCUM_BLUE_SIZE;
 574                     gl_attribList[p++] = wx_attribList[arg++];
 575                     break;
 576                 case WX_GL_MIN_ACCUM_ALPHA:
 577                     gl_attribList[p++] = GLX_ACCUM_ALPHA_SIZE;
 578                     gl_attribList[p++] = wx_attribList[arg++];
 579                     break;
 580                 default:
 581                     break;
 582             }
 583         }
 584
 585         gl_attribList[p] = 0;
 586     }
 587 }
 588
 589 void wxGLCanvas::QueryGLXVersion()
 590 {
 591     if (m_glxVersion == 0)
 592     {
 593         // check the GLX version
 594         int glxMajorVer, glxMinorVer;
 595         bool ok = glXQueryVersion(GDK_DISPLAY(), &glxMajorVer, &glxMinorVer);
 596         wxASSERT_MSG( ok, _T("GLX version not found") );
 597         if (!ok)
 598             m_glxVersion = 10; // 1.0 by default
 599         else
 600             m_glxVersion = glxMajorVer*10 + glxMinorVer;
 601     }
 602 }
 603
 604 int wxGLCanvas::GetGLXVersion()
 605 {
 606     wxASSERT_MSG( m_glxVersion>0, _T("GLX version has not been initialized with wxGLCanvas::QueryGLXVersion()") );
 607     return m_glxVersion;
 608 }
 609
 610
 611 void wxGLCanvas::SwapBuffers()
 612 {
 613     if (m_glContext)
 614         m_glContext->SwapBuffers();
 615 }
 616
 617 void wxGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
 618 {
 619 }
 620
 621 void wxGLCanvas::SetCurrent()
 622 {
 623     if (m_glContext)
 624         m_glContext->SetCurrent();
 625 }
 626
 627 void wxGLCanvas::SetColour( const wxChar *colour )
 628 {
 629     if (m_glContext)
 630         m_glContext->SetColour( colour );
 631 }
 632
 633 void wxGLCanvas::OnInternalIdle()
 634 {
 635     if (m_glContext && m_exposed)
 636     {
 637         wxPaintEvent event( GetId() );
 638         event.SetEventObject( this );
 639         GetEventHandler()->ProcessEvent( event );
 640
 641         m_exposed = FALSE;
 642         GetUpdateRegion().Clear();
 643     }
 644
 645     wxWindow::OnInternalIdle();
 646 }
 647
 648
 649
 650 //---------------------------------------------------------------------------
 651 // wxGLApp
 652 //---------------------------------------------------------------------------
 653
 654 IMPLEMENT_CLASS(wxGLApp, wxApp)
 655
 656 wxGLApp::~wxGLApp()
 657 {
 658     if (m_glFBCInfo)
 659         XFree(m_glFBCInfo);
 660     if (m_glVisualInfo)
 661         XFree(m_glVisualInfo);
 662 }
 663
 664 bool wxGLApp::InitGLVisual(int *attribList)
 665 {
 666     wxGLCanvas::QueryGLXVersion();
 667
 668     if (wxGLCanvas::GetGLXVersion() >= 13)
 669     {
 670         // GLX >= 1.3
 671         if (m_glFBCInfo)
 672             XFree(m_glFBCInfo);
 673         m_glFBCInfo = wxGLCanvas::ChooseGLFBC(attribList);
 674
 675         if (m_glFBCInfo)
 676         {
 677             if (m_glVisualInfo)
 678                 XFree(m_glVisualInfo);
 679             m_glVisualInfo = glXGetVisualFromFBConfig(GDK_DISPLAY(), ((GLXFBConfig *)m_glFBCInfo)[0]);
 680         }
 681         return (m_glFBCInfo != NULL) && (m_glVisualInfo != NULL);
 682     }
 683     else
 684     {
 685         // GLX <= 1.2
 686         if (m_glVisualInfo)
 687             XFree(m_glVisualInfo);
 688         m_glVisualInfo = wxGLCanvas::ChooseGLVisual(attribList);
 689         return m_glVisualInfo != NULL;
 690     }
 691 }
 692
 693 #endif
 694     // wxUSE_GLCANVAS